Surname List: Begins with O


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All surnames beginning with O, sorted alphabetically (total individuals):

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1. o 'Beolan (2)
2. o 'Brien (1)
3. o 'Callaghan (8)
4. o' Bannon (1)
5. o' Bell (9)
6. o' Beolain (1)
7. o' Boyle (1)
8. o' Breen (18)
9. o' Brennan (1)
10. o' Brian (12)
11. o' Brien (222)
12. o' Brien de Thomond (3)
13. o' Brien-Ara (1)
14. o' Bryan (5)
15. o' Bryen (4)
16. o' Byrne (4)
17. o' Caerbhaill (1)
18. o' Cahan (5)
19. o' Callaghan (24)
20. o' Carrol (1)
21. o' Carroll (7)
22. o' Cavanagh (2)
23. o' Cearbhall (2)
24. o' Cheinnselaig (14)
25. o' Chennselaig (1)
26. o' Chorb (1)
27. o' Chuind (1)
28. o' Conaing (1)
29. o' Connell (60)
30. o' Conner (1)
31. o' Conners (1)
32. o' Connor (61)
33. o' Connor-Kerry (1)
34. o' Conor (6)
35. o' Conor Sligo (1)
36. o' Crega (1)
37. o' Cuillen (1)
38. o' Daire Rainey (1)
39. o' Dea (2)
40. o' Dell (5)
41. o' Dennel (1)
42. o' Docherty (2)
43. o' Donell (1)
44. o' Donnagan (1)
45. o' Donnel (1)
46. o' Donnell (53)
47. o' Donnell von Tyrconell (3)
48. o' Donnell von Tyrconnell (3)
49. o' Donoghue (1)
50. o' Donovan (3)
51. o' Draine (1)
52. o' Duibhne (1)
53. o' Dungalaig (1)
54. o' Duraghy (1)
55. o' Eagra (1)
56. o' Eidin (1)
57. o' Fallon (2)
58. o' Faolain (2)
59. o' Farrell (2)
60. o' Felan (1)
61. o' Ferral (1)
62. o' Ferrall-Boy (2)
63. o' Flaherty (4)
64. o' Fogarty (1)
65. o' Fogurty (1)
66. o' Garvey (2)
67. o' Grady (41)
68. o' Hagan (3)
69. o' Halloran (1)
70. o' Hara (28)
71. o' Hartigan (1)
72. o' Hea (1)
73. o' Hegerty (4)
74. o' Kane (2)
75. o' Keefe (6)
76. o' Keeff (1)
77. o' Keeley (3)
78. o' Kelly (6)
79. o' Kennedy (8)
80. o' Key (1)
81. o' Killey (1)
82. o' Knightley (2)
83. o' Lalor (1)
84. o' Lavery (2)
85. o' Leary (6)
86. o' Lorcain (1)
87. o' Loughnan (1)
88. o' Madden (2)
89. o' Mahony (1)
90. o' Maille Owen (1)
91. o' Maillend (3)
92. o' Malia (1)
93. o' Malley (3)
94. o' Mara (10)
95. o' Meagber (1)
96. o' Mealy (1)
97. o' Melaghlin (5)
98. o' Moore (14)
99. o' Morda (1)
100. o' More (5)
101. o' Mullane (1)
102. o' Mulloy (1)
103. o' Mulyran (1)
104. o' Murphy (1)
105. o' Neal (11)
106. o' Neale (3)
107. o' Neall (9)
108. o' Neil (3)
109. o' Néill (106)
110. o' Neill de Tyrone (1)
111. o' Nolan (1)
112. o' Phelan (1)
113. o' Pluingceid (1)
114. o' Quin (1)
115. o' Rear (1)
116. o' Regan (1)
117. o' Reilly (6)
118. o' Rorke (5)
119. o' Rourk (2)
120. o' Rourke (1)
121. o' Ruarc (5)
122. o' Ryn (1)
123. o' Shaughnessy (7)
124. o' Sullivan (26)
125. o' Sullivan Beare (2)
126. o' Tard la Grange-Keith (1)
127. o' Toole (16)
128. O'Blennis (1)
129. Oachs (4)
130. Oadham (2)
131. Oak (1)
132. Oakden (1)
133. Oakes (33)
134. Oakey (5)
135. Oakleaf (1)
136. Oakley (16)
137. Oaks (6)
138. Oates (7)
139. Obachah (1)
140. Obama (5)
141. Obanion (1)
142. Obbard (1)
143. Obbema (1)
144. Obbens (1)
145. Obdam (1)
146. Obedience (1)
147. Obelink (1)
148. Obelitz (1)
149. Obell (1)
150. Oben (2)
151. Obenberg (1)
152. Obeniche (1)
153. Ober (7)
154. Oberacker zu Sieghartsstein (1)
155. Oberembt (2)
156. Oberhlotzer (1)
157. Oberholster (16)
158. Oberholzer (6)
159. Oberleuter von Lassing (1)
160. Oberlin (2)
161. Oberländer (4)
162. Obermair (2)
163. Obermayer (2)
164. Obermeyer (1)
165. Obernaür (1)
166. Oberstadt (1)
167. Obertacke (1)
168. Oberti (2)
169. Obijn (1)
170. Obolenska (1)
171. Obolenskaia (1)
172. Obolenskaja (1)
173. Obolensky (18)
174. Obolensky-Neledinsky-Meletzky (4)
175. Oboussier (1)
176. Obreen (2)
177. Obrenović (7)
178. Obrenovic (7)
179. Obrist (1)
180. Obukova (1)
181. Occo (1)
182. Och (2)
183. Ochoa de Ondategui (2)
184. Ochs von Gunzendorf (2)
185. Ochs von Sonnau & Reichersperg (2)
186. Ochsin von Gunzendorf (1)
187. Ochterlony (3)
188. Ocieska (1)
189. Ockel (2)
190. Ockens (4)
191. Ockers (14)
192. Ockers Cau (2)
193. Ockerse (7)
194. Ockersse (27)
195. Ockerz. (1)
196. Ockes (2)
197. Ockhorst (4)
198. Ockhuysen (1)
199. Ockinga (5)
200. Ockstee (1)
201. Ocskay de Ocsko (1)
202. Octavius (1)
203. Octon (1)
204. Odard (1)
205. Odart (5)
206. Odart de Rilly d'Oysonville (1)
207. Odberre (1)
208. Odde (1)
209. Oddie (6)
210. Odding (1)
211. Oddyle (2)
212. Odé (1)
213. Odell (18)
214. Odendaal (21)
215. Odendahl (1)
216. Odenhoven (1)
217. Odenthal (1)
218. Oder (3)
219. Odescalchi (29)
220. Odescalchi di Novara (1)
221. Odet (1)
222. Odette (1)
223. Odgers (1)
224. Odier (2)
225. Odijk (1)
226. Odilia (1)
227. Odinck (1)
228. Odingsells (3)
229. Odink (1)
230. Odino (1)
231. Odinot (2)
232. Odinsson (1)
233. Odiorne (1)
234. Odland (4)
235. Odling (1)
236. Odlum (2)
237. Odoe (1)
238. Odoevskaya (2)
239. Odoevsky (1)
240. Odom (4)
241. Odone (4)
242. Odor (1)
243. Odou (1)
244. Odoyevskaya (1)
245. Odrowazowna (1)
246. Odson (1)
247. Odum (1)
248. Odygd (3)
249. Oechslin (1)
250. Oedses (1)
251. Oedtsma (3)
252. Oedtsma van Juckema (3)
253. Oeheim (2)
254. Oehler (1)
255. Oehlmann (1)
256. Oehninger (1)
257. Oeijen (1)
258. Oelbermann (1)
259. Oeler (5)
260. Oelhafen (1)
261. Oeloffse (1)
262. Oelofse (17)
263. Oelrichs (5)
264. Oelwein (1)
265. Oem (77)
266. Oem van Papendrecht (1)
267. Oem van Wijngaarden (34)
268. Oem van Wijngaerden (7)
269. Oem van Wyngaerden (1)
270. Oem van Zevender (2)
271. Oemcens (1)
272. Oenema (4)
273. Oentses (1)
274. Oepkes (2)
275. Oerinck (1)
276. Oerlemans (3)
277. Oertgen (2)
278. Oerthling (1)
279. Oertwein (2)
280. Oertwin (1)
281. Oesau (31)
   282. Oesebrand (1)
283. Oeser (2)
284. Oessendorff (1)
285. Oest (9)
286. Oesterberg (1)
287. Oesterlen (1)
288. Oesterling (1)
289. Oestermann (3)
290. Oesters (1)
291. Oesterschmidt (1)
292. Oestherhaut (1)
293. Oeters van Maris (1)
294. Oetgens (10)
295. Oetgens van Waveren (5)
296. Oetgens van Waveren Pancras Clifford (16)
297. Oetgins (2)
298. Oetinger (2)
299. Oetker (9)
300. Oettingen (3)
301. Oettingen Ettinger-Halevi (1)
302. Oevermans (1)
303. Oexle von Friedenberg (1)
304. of Acre (1)
305. of Acton (2)
306. of Agade (2)
307. of Ailech (1)
308. of Albha (1)
309. of Alcester (1)
310. of Aleppo (1)
311. of Allardice (1)
312. of Aller (4)
313. of Allerdale (1)
314. of Anathoth (1)
315. of Androssan (1)
316. of Angeln (3)
317. of Angoulême (1)
318. of Angus (16)
319. of Antioch (1)
320. of Anu (1)
321. of Argyll (3)
322. of Argyllshire (12)
323. of Arimathaea (1)
324. of Armorica (2)
325. of Arrapachtis (1)
326. of Aspinall (4)
327. of Athol (5)
328. of Atholl (6)
329. of Babylon (3)
330. of Balcarrie (1)
331. of Ballagh (1)
332. of Bamborough (4)
333. of Bantry (1)
334. of Barenshill (2)
335. of Bedford (2)
336. of Beersheba (1)
337. of Bermingham (1)
338. of Bernica (16)
339. of Bernicia (4)
340. of Berry Pomeroy (1)
341. of Berwick (1)
342. of Blantyre (1)
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344. of Borthwick (2)
345. of Boscath (1)
346. of Bothwell (1)
347. of Braytoft (1)
348. of Bretargh (1)
349. of Bristol (1)
350. of Britons (1)
351. of Brittany (1)
352. of Brotherton (1)
353. of Buchan (2)
354. of Burlington (1)
355. of Caithness (7)
356. of Callendar (3)
357. of Cambridge (11)
358. of Cardigan (1)
359. of Carew (1)
360. of Carlisle (1)
361. of Carrick (7)
362. of Cathcart (1)
363. of Chattan (10)
364. of Cheddar (1)
365. of Chester (3)
366. of Chesterfield (1)
367. of Chisholm (1)
368. of Cimmerians (11)
369. of Cinneal Eoguin (1)
370. of Clarence (4)
371. of Colchester (1)
372. of Connacht (1)
373. of Connaught (4)
374. of Corbi (1)
375. of Cornwall (28)
376. of Cranntock (1)
377. of Cumbria (2)
378. of Dalradia (6)
379. of Deheubarth (1)
380. of Deira (2)
381. of Denia & Balearic (1)
382. of Denmark (2)
383. of Desmond (1)
384. of Devon (3)
385. of Dimitia (1)
386. of Docwra (1)
387. of Dol (5)
388. of Dorset (1)
389. of Douni (2)
390. of Draffen (1)
391. of Dublin (9)
392. of Dule (1)
393. of Dull (1)
394. of Dunbar (23)
395. of Durham (3)
396. of Dyfed (4)
397. of East Anglia (11)
398. of Eccles (2)
399. of Egypt (13)
400. of England (80)
401. of Essex (4)
402. of Ethod (1)
403. of Fasselane (1)
404. of Fife (5)
405. of Finland (1)
406. of Flint (1)
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411. of Färlä (1)
412. of Galacia (1)
413. of Galbraith (2)
414. of Galicia (3)
415. of Gall (1)
416. of Galloway (3)
417. of Gask (1)
418. of Gibeah (2)
419. of Gilsland (3)
420. of Gloucester (13)
421. of Granada (1)
422. of Greece (1)
423. of Greenwille (2)
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428. of Hadeland (2)
429. of Harrington (1)
430. of Haselden (5)
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436. of Holland (10)
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438. of Huntingdon (10)
439. of Huntington (5)
440. of Ireby (1)
441. of Ireland (14)
442. of Isbell (2)
443. of Islay (1)
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445. of Italy (2)
446. of Jerusalem (3)
447. of Jordan (1)
448. of Jotbah (1)
449. of Judah (18)
450. of Jutland (3)
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452. of Kent (30)
453. of Khazaria (2)
454. of Kherait (3)
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456. of Killeen (2)
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463. of Lennox (24)
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466. of Levanach (2)
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469. of Libnah (1)
470. of Lincoln (3)
471. of Loarn (1)
472. of Lochaber (8)
473. of Lochore (1)
474. of Lorn (6)
475. of Lot (2)
476. of Lumley (7)
477. of Lundy (1)
478. of Luss (2)
479. of Lyon Logie (1)
480. of Macedonia (1)
481. of Man (5)
482. of Man & Dublin & the Isles (1)
483. of Mar (6)
484. of Marr (1)
485. of Mawddy (1)
486. of Meirionydd (2)
487. of Menteith (2)
488. of Menteth (2)
489. of Mercia (71)
490. of Mexico (2)
491. of Middleton (1)
492. of Misterton (1)
493. of Moab (2)
494. of Montal (1)
495. of Montenegro (1)
496. of Montifex (1)
497. of Montivilliers (1)
498. of Monymusk (1)
499. of Moray (5)
500. of Mostyn (1)
501. of Moynet (2)
502. of Munster (2)
503. of Murdistown (1)
504. of Namur (1)
505. of Newton (2)
506. of North Wales (1)
507. of Northampton (1)
508. of Northhampton (1)
509. of Northumberland (7)
510. of Northumbria (20)
511. of Norway (1)
512. of Nottingham (2)
513. of Novgorod (1)
514. of Orbe, Switzerland (1)
515. of Orkney (15)
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521. of Ossory (3)
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523. of Portugal (2)
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528. of Rama (2)
529. of Ravensworth (2)
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533. of Ross (10)
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536. of Ruthven (1)
537. of Rutland (1)
538. of Salisbury (3)
539. of Saltmarsh (1)
540. of Sanford (3)
541. of Scotland (73)
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543. of Scottish Dalradia (1)
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546. of Shinar (1)
547. of Shropshire (2)
548. of Sibton (1)
549. of Sicambri (15)
550. of Siluria (2)
551. of Skipwith (1)
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554. of South-Gyrwas (1)
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558. of St. Sever (1)
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560. of Stra... (2)
561. of Strathbogie (1)
562. of Strathclyde (14)
   563. of Strathearn (21)
564. of Strathnaver (2)
565. of Sula (1)
566. of Sura (1)
567. of Surrey (2)
568. of Talou (1)
569. of Tamworth (1)
570. of Tatshull (1)
571. of the Angles (3)
572. of the Aztecs (1)
573. of the Balearic Isles (1)
574. of the Baltic Goths (1)
575. of the Chaldees (1)
576. of the Gainas (1)
577. of the Goths (1)
578. of the Iceni (1)
579. of the Isle of Wight (1)
580. of the Isles (5)
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582. of the Kumans (2)
583. of the Mountains (2)
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587. of the Picts (17)
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590. of the Visigoths (12)
591. of the West Goths (3)
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593. of Throndheim (3)
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599. of Troy (41)
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603. of Ur & Agade (3)
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607. of Warwick (9)
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645. Ogden (140)
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